Eldrazi Aggressor is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
Devoid (This card has no color.) This creature has haste as long as you control another colorless creature.
Complete guide
Eldrazi Aggressor is a versatile threat that utilizes the Devoid mechanic to ignore the traditional color identity limitations of Magic. By rewarding you for building a board of colorless allies, this Eldrazi Drone can apply pressure the moment it hits the battlefield. Understanding how its haste interacts with other permanents is key to maximizing your aggressive starts.
Understanding Devoid and Haste
The first thing to note is Devoid; despite its red mana cost, Eldrazi Aggressor is colorless in all zones, including the stack and the battlefield. Its second ability is a static condition that grants it haste. Unlike a triggered ability, this doesn't use the stack—it is either active or inactive based on whether you control another colorless creature, such as an artifact creature or another Devoid Eldrazi.
Resolution and Combat Timing
When you cast Eldrazi Aggressor, the game checks the battlefield the moment it enters. If you already control a colorless creature, the Aggressor gains haste immediately. If you lose control of all other colorless creatures during your declare attackers step after you have already legally declared the Aggressor as an attacker, it will continue to attack. Haste is only required for the declaration of the attack, not the continuation of it.
Common Mistakes
Players often forget that Devoid means the card is colorless even while it is a spell. This means it can be targeted by spells that affect colorless objects but not by those that target red spells. Another common mistake is thinking the Aggressor provides haste to itself; the card explicitly requires you to control *another* colorless creature for the ability to function.
Strategic Deployment
To get the most value out of Eldrazi Aggressor, play it in decks featuring high counts of artifact creatures or Eldrazi. Since many artifacts are naturally colorless, they act as reliable 'enablers' for the Aggressor's haste, ensuring you can attack before your opponent has time to set up their defenses.
Interaction examples
If you control Solemn Simulacrum and cast Eldrazi Aggressor, the game sees that you control another colorless creature. Eldrazi Aggressor immediately gains haste and can attack during the same turn it was played.
Roaming Throne is a colorless artifact creature. Even if you choose a creature type other than Eldrazi for Roaming Throne, its presence on the battlefield satisfies Eldrazi Aggressor's requirement for another colorless creature, granting it haste.
You declare an attack with Eldrazi Aggressor because you control Solemn Simulacrum. Before blockers are chosen, your opponent destroys Solemn Simulacrum. Although Eldrazi Aggressor no longer has haste, it has already been legally declared as an attacker and remains attacking the target player or planeswalker.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Eldrazi Aggressor
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
If it's the turn Eldrazi Aggressor comes under your control, and it loses haste after being declared as an attacker, it will continue to attack. It won't be removed from combat.
No other card is named in this ruling.
Legal formats
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Meta decks with Eldrazi Aggressor
No archived Top 8 deck with this card yet.



Solemn Simulacrum
Roaming Throne